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Just launched at Nordstrom and online: GoSmile's Smile Whitening Light System, $169, the first over-the-counter at-home LED light-white system that guarantees to whiten your teeth six shades in 30 minutes. How? The release says: "Use a convenient, single-dose ampoule to apply a thin layer of whitening serum to your teeth. Hold the device to your mouth for about 10 minutes, until the timer beeps. Repeat the process twice more. One treatment takes 3 ampoules, and about 30 minutes." No doctors, no appointments, no scary sensitivity. Yay! [Racked Inbox]